A009245 - OEIS

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A009245

Expansion of exp(tan(x))/cosh(x).

1, 1, 0, 0, 8, 32, 56, 280, 3968, 27520, 133248, 1072896, 13993088, 137702528, 1139191808, 12544190464, 178943504384, 2268209053696, 26439024316416, 366953307820032, 5943319707680768, 91839717688770560 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	MATHEMATICA	`Exp[ Tan[ x ] ]/Cosh[ x ]`
	CROSSREFS	`Sequence in context: A129749 A005879 A067519 * A018842 A139098 A130809` `Adjacent sequences: A009242 A009243 A009244 * A009246 A009247 A009248`
	KEYWORD	`nonn,easy`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

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Last modified February 16 21:17 EST 2012. Contains 205971 sequences.